Local approximate symmetry of Birkhoff-James orthogonality in normed linear spaces
Abstract
Two different notions of approximate Birkhoff-James orthogonality in nor\-med linear spaces have been introduced by Dragomir and Chmie\-li\'n\-ski. In the present paper we consider a global and a local approximate symmetry of the Birkhoff-James orthogonality related to each of the two definitions. We prove that the considered orthogonality is approximately symmetric in the sense of Dragomir in all finite-dimensional Banach spaces. For the other case, we prove that for finite-dimensional polyhedral Banach spaces, the approximate symmetry of the orthogonality is equivalent to some newly introduced geometric property. Our investigations complement and extend the scope of some recent results on a global approximate symmetry of the Birkhoff-James orthogonality.
Keywords
Cite
@article{arxiv.2012.08162,
title = {Local approximate symmetry of Birkhoff-James orthogonality in normed linear spaces},
author = {Jacek Chmieliński and Divya Khurana and Debmalya Sain},
journal= {arXiv preprint arXiv:2012.08162},
year = {2020}
}